剑指 offer 58-01 翻转单词顺序

分割+倒序

class Solution {
    public String reverseWords(String s) {
        s.trim();//删除首尾空格
        String[] strs = s.split(" ");
        StringBuilder sb = new StringBuilder();
        for (int i=strs.length-1;i>=0;i--){
            if(!strs[i].equals(""))
                sb.append(strs[i]+" ");
        }
        return sb.toString().trim();
    }
}